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4 Commits

Author SHA1 Message Date
Maisem Ali 3304819739 metrics: add histogram support 
Add initial histogram support.

Updates tailscale/corp#8641

Signed-off-by: Maisem Ali <maisem@tailscale.com>
 2023-07-18 09:18:55 -07:00
Brad Fitzpatrick 79ee6d6e1e tsweb/varz: use default metrics.LabelMap.Label on serialization 
To not break Prometheus if the label is unset.

Updates tailscale/corp#12830

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2023-06-30 09:08:43 -07:00
Brad Fitzpatrick eefee6f149 all: use cmpx.Or where it made sense 
I left a few out where writing it explicitly was better
for various reasons.

Updates #8296

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2023-06-07 22:06:24 -07:00
Anton Tolchanov 8546ff98fb tsweb: move varz handler(s) into separate modules 
This splits Prometheus metric handlers exposed by tsweb into two
modules:
- `varz.Handler` exposes Prometheus metrics generated by our expvar
  converter;
- `promvarz.Handler` combines our expvar-converted metrics and native
  Prometheus metrics.

By default, tsweb will use the promvarz handler, however users can keep
using only the expvar converter. Specifically, `tailscaled` now uses
`varz.Handler` explicitly, which avoids a dependency on the
(heavyweight) Prometheus client.

Updates https://github.com/tailscale/corp/issues/10205

Signed-off-by: Anton Tolchanov <anton@tailscale.com>
 2023-04-11 08:37:32 +01:00